Re: [boost] [XInt] CoW/Move Timings

Subject: Re: [boost] [XInt] CoW/Move Timings
From: Marsh Ray (marsh_at_[hidden])
Date: 2011-03-10 15:32:10

On 03/10/2011 12:33 PM, SATAN66613 wrote:
>
> apart from some 3-to-20% boost (oh, sorry for a pun) cow saves some heap
> at least cow _DOES NOT_ make it worse

Was this a multithreaded test where interlocked ops on refcounts  can 
potentially cause ping-ponging of cache lines across multiple cores?

I'm not saying that this is an overriding concern, only that the "no 
free lunch" principle suggests that there is likely to be least some 
possible benchmark for which even the best optimization performs worse.

- Marsh